Answer:
There were a few reasons why. The American colonies were extremely under-represented in British Parliament. They believed they had say as people of the kingdom in what their laws should be, but Britain thought otherwise. Britain's treatment for the colonies became harsher following the French and Indian War. This was because Great Britain made it the colonies' responsibility to repay the enormous debt caused by the war. The laws that were imposed to collect higher taxes to fix the debt angered the colonists, so they wanted to become independent to rule their own lives.